Cut-out for electric sad-irons.



W.S.HADAWAY;Jm

GUT-OUT FOR ELEGTBIO SAD IRONS.

- APPLICATION FILED JUNE25, 1910. 1,015,954, Patented Jan. 30,1912.

4 6 K H o,

1 B 7 I 1f\ f L L -J 3 INVENTOR ATTORNEY UNITED STATES PATENT OFFICE.

WILLIAM s. HADAWAY, JR, or EAST oRANoE, NEW JERSEY, KssIeNo'R T0 wEsrING- HOUSE ELECTRIC AND MANUFACTURING-JCOMPANY, A CORPORATION or PENN- SYLVANIA.

GUT-OUT FOR ELECTRIC SAD-IRONS.

Specification of Letters Patent.

Patented J an. 30, 1912.

Application filed June 25, 1910. Serial No. 568,873.

ed sad irons,

The object of my invention is to provide a simple automatic means for interrupting the circuit of a sad iron heater when the temperature of the device exceeds a predetermmed value.

Sad irons and other electric heating. de-Y vices are liable to set fire to adjacent inflammable material, or, at least, become heated to an objectionable degree, if they are not disconnected from the supply circuit when out of service for a considerable length of time. As is well known, the danger just referred to is not necessarily dependent upon the amountof current supplied to the resistance element, since a large amount of heat maybe dissipated when the device is in service, while a relatively small amount of current may produce a dangerous amount of heat if applied for a considerable period of time when the device is not in use.

According to my present inventioml lo- 7 cate a plunger in abody of easily fusible material which will become softened when that a' single spring, acting through suit able mechanism, moves the plunger in one.

direction in order to interrupt the supply circuit of the device when the fusible material is softened, and, acting through another mechanism, immediately returns the plunger to its original position before the fusible material has an opportunity to harden. In this way, the circuit may readily be closed when it is again desired to use the device. By utilizing'a single relatively strong spring and two sets of connections, the adaptatlon of my invention to an electric sad iron of the usual form is particularly facili ted, as hereinafter pointed out. a

Figure 1" of the accompanying drawings is a partially sectional elevation of an electric sad iron embodying the automatic cuta handle bracket 5, a handle 6 and an autof matic cut-out device 7.

The resistance element 3 may be of any suitable type, but I prefer to employ. a fiat structure which is similar to that shown in my co-pending application, Serial No.

445,199, filed July 24, 1908. The terminals of the resistance elements are secured to connector plugs 8 which project outwardly from the heel of the iron and are adapted to be engaged by a socket connector 9 to which the supply circuit conductors, 10 are connected, in the usual manner.

- The automatic cut-out device 7 comprlses a small body 11 of fusible material, such as solder or Babbitt metal, the composition of which is such that it is softened when the temperature of'the sad iron body exceeds '13 which ispivotally secured to the plunger,

levers 14 and 15 which are fulcrumed, respectively, upon pins 16 and 17 that are securedto the handle bracket 5 (see Fig. 1) aspring 18 that joins the outer ends "of the levers 14 and 15, and links 19 and 20. The link' 19 is pivotally connected, at its respective ends, to thelever 15 and the latch 13, and the link 20 has, one end pivotally secured to the lever 14 and is notched, near its opposite end, to provide a projection 21 which is adapted to engage the latch 13, under nor-. mal conditions. The pivotal pointof the lever 14 is relatively close to the connection between the parts 14 and 20, while the piv otal point of the lever 15 is relatively close to the point of connection between the parts '15'and 18. The arrangement of parts is a predetermined amount; a plunger 12 and the link 20 will be released from the latch 13. The spring 18', which is normally under strong tension, produces such movement of the lever 14 s to ejectthe socket member 9 when the ink 20 is re- .leased, as above indicated, and thereby interrupt the circuit of the resistance element. As soon as the link 20 is released, the tension of the spring 18, acting with less force through the lever 15, immediately returnsthe plunger 12 to the position shown in Fig.

-1 of the drawings before .the material 11 has an opportunity to set; When the sad'iron is sufliciently cool and the material 11 is set, the circuit of the sad iron maybe reestablished by forcing the socket connection 9 onto the terminal plugs 8, so as to reestablish engagement of the link 20 with the latch 13. The link 20 is guided in its move ment by means 'of a projection 22 which ex-.

tends upwardly through a slot 23 in the handle bracket 5 and is offset, as shown in Fig. 4 of the drawings.

The handle bracket 5 is of channel shape in cross section and is bent in the form of a U'so that the parts 14, 15, 19 and 20 may be conveniently and inconspicuously located within it.- The handle 6 is secured to the bracket 5 by a bolt 24, about which the helical spring 18 is coiled.

the temperature of the iron, a plunger set in said body of fusible material, a latch pivotally secured to the plunger and a circuit interrupter, of a single spring dependentupon the softening of the fusible material for actuating the circuit interrupter and for returning the latch to its normal position.

3. In an electric sad iron, the combination with a resistance element, a body of fusible material adapted to be influenced by the temperature of the iron, a plunger set in said body of fusible material, a latch pivotally secured to the plunger, and a circuit 1 interrupter, of a single spring, and two connected mechanisms one of which is actuated by said spring to move the plunger in one direction and to operate the circuit interrupter and the other to move the plunger in the opposite direction.

4. In an electric sad iron, the combination with a resistance element, a body of fusible material adapted to be influenced by the temperature of the iron, a plunger set in said body of fusible material, a latch pivotally secured to the plunger, and a circuit interrupter, of a single spring, and two mechanismsunequally responsive to the action of the spring and serving, respectively,

,to move the plunger in one direction and actuate the circuit interrupter and to move the plunger in the. opposite direction, whereby the heater circuitof the device is interrupted upon the softening of the fusible material and the plunger is restoredto its original POSIltlO-IL:

5. An electric sad lron comprlslng a body, a handle, a resistance element, a circuit interrupter, a heat-released latch and a single spring inthe handle for actuating the circuit interrupter and for returning the latch to its normal position.

'Intestimony whereof, I have hereunto subscribed my name this 20th day of June,

1910. WILLIAM S.,HADAWAY, JR.

Witnesses:

W.'O. PEALE, B. B. Hrnns. 

